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Harvard Health Letter

By the way, doctor: Is that too much vitamin D?

Published: April, 2008

Q. My doctor found that my blood levels of vitamin D were low, and gave me a prescription for 50,000 international units of vitamin D to be taken every two weeks. But I've read that the recommended dose is more like 1,000 IU a day, and that more than 2,000 IU a day is unsafe. I'm a healthy woman (albeit somewhat osteopenic already) and don't want to do more harm than good!

A. Your doctor's prescription makes sense, but I can see why you're confused.

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